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The kernel communicates with the E902 core through the mailbox transport using AON firmware protocol. Add dt-bindings to document it the dt node. Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com> Acked-by: Drew Fustini <drew@pdp7.com> Link: https://lore.kernel.org/r/20250311171900.1549916-2-m.wilczynski@samsung.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
54 lines
1.4 KiB
YAML
54 lines
1.4 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/firmware/thead,th1520-aon.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: T-HEAD TH1520 AON (Always-On) Firmware
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description: |
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The Always-On (AON) subsystem in the TH1520 SoC is responsible for managing
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low-power states, system wakeup events, and power management tasks. It is
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designed to operate independently in a dedicated power domain, allowing it to
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remain functional even during the SoC's deep sleep states.
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At the heart of the AON subsystem is the E902, a low-power core that executes
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firmware responsible for coordinating tasks such as power domain control,
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clock management, and system wakeup signaling. Communication between the main
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SoC and the AON subsystem is handled through a mailbox interface, which
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enables message-based interactions with the AON firmware.
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maintainers:
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- Michal Wilczynski <m.wilczynski@samsung.com>
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properties:
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compatible:
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const: thead,th1520-aon
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mboxes:
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maxItems: 1
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mbox-names:
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items:
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- const: aon
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"#power-domain-cells":
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const: 1
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required:
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- compatible
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- mboxes
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- mbox-names
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- "#power-domain-cells"
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additionalProperties: false
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examples:
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- |
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aon: aon {
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compatible = "thead,th1520-aon";
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mboxes = <&mbox_910t 1>;
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mbox-names = "aon";
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#power-domain-cells = <1>;
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};
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